Henry



(No Model.)

H. J. DURGIN.

TABLE LEAP SUPPORT.

No. 279,231. Patented June 12, I883.

. UNITED STATES PATENT OFFICE.

HENRY J. human, or nocrinsrnn, new YORK.

TA BLE-LEAF SUPPORT.

SPECIFICATION forming part of Letters Patent No. 279,231, dated June 12, 1883,

V Applicatiofifiled March 15, 1883. (No model.)

To all whom it may concern.-

Be it known that I, HENRY J. DURGIN, of

Rochester, in the county of Monroeyand State of New York, have invented a new and useful Improvement in Table-Leaf Supports, which improvement is fully set forth in the following specification and accompanying drawings.

The obj cct of my invention is to produce an improved table-leaf support similar to the one shownin my Patent No. 264., 518, dated September 19, 1882, in which the 'opposing stops of the joint at the middle of the support are placed within or between the joined parts to protect said stops from injury, and to formthe parts with a design to have the spring bend laterally in operating the support, instead of in a vertical plane, as set forth in said patent.

Referring to the drawings, Figure 1 is a side elevation ofa portion ofa table with the support in position under the leaf, showing also a dotted position of the leaf and support; Flf). 2, a view of the support detached, taken as indicated by arrow in Fig. 1; Fig. 3, a face view of a portion of one of the pieces at the joint, showing the interior of said joint, viewed as indicated by arrow in Fig. 2; Fig. 4c, asection of Fig. 3 through the center of the j oint, on the dotted line, viewed as indicated by arrow 7 in the latter figure; and Fig. 5, a detached part of a piece at the joint, viewed as indicated by arrow 2 in Fig. 3, the last three figures being drawn to a larger scale than Figs. 1 and 2.

I h ave found by further experience and trial that it is more convenient to press back the locking-spring laterally by the thumb when it is wished to unlock the support and drop the leaf than to lift the spring in a vertical plane, as was necessary in the construction shown in my above-named patent; also, thatto place the stops that operate in combination with the spring to stay the support under the leaf within the joint much limproves the supportin rendering it more durable and secure.

Referring to the parts, A is a portion of the.

the pin 0 are formed into flat circular heads I.' and Z, respectively, and the former arm is bifurcated or formed with a free-end tine or spring, f, similar to the corresponding parts shown in my patent named above.

The sprin t, it will be seen, unlike the spring shown in said patent, bends laterally or sidewisein the operation of the support, instead of vertically.

c is an inclined plane or part, formed to project from the periphery of the head I, and offset laterally therefrom in a direction away from the face r, having a square end or face, 1', against which the end of the spring ts'quarely abuts when the support is brought to stand under the leaf, as shown.

\Vhen the support is to be doubled for the purpose of dropping the leaf, the spring is pressed by the thumb back laterally to the po sition shown in dotted lines in Fig. 2, so that it may pass by the inclined part c as the support folds. -\V hen the operation is reversedthat is tosay, when the leafis raised to ahorizontal positionthe spring, when it's free end arrives at the face i of the part 0, will snap into place in front thereof, with its end abut ting against said face i of the part c, as above stated.

A small stop, 0, projecting from the head 1, serves to receive the spring and prevent it passing by the face of the part c to the inside thereof. A simple hook-shaped piece or guard, p, projecting from the head I, prevents the spring being forced back by the thumb so far as to endanger it. i 1 V In each of the opposing contiguous faces of the heads k and Z is formed an annular groove, one being shown at b in Fig. 3. These grooves are alike in dimensions and opposite each other, as shown in Fig. 4, and in each of them is formed a tooth, a, which stands radially across the groove, each tooth having its point projecting beyond the face of the head into the opposing groove, as shown. These teeth are so located within the heads that they meet face to face at the instant the end of the spring drops into place in front of the face l of the part 6, as above stated, when the support is brought to stand in a straight line under the leaf. It will be understood that by the action of these teeth or stops and the spring abutting shown. The arms I) and (l at the ends joined by against the face i the arms I) and (Z become rigidly locked together, and when thus locked the support will resist any lateral pressure tend ing to turn the joint at c, as applied, for instance, in the direction indicated by the arrow in Fig. 1, or in a direction opposite. The sup port can only be folded by pressing the spring back, so as to pass the part 6, as stated above.

The inclined part c, offset in a direction back from the face of the head Z, and the contiguous parts therewith, are shown more fully in out line at F, Fig. 3.

The spring t is not in the same vertical plane with the pivoted branch of the arm b, as shown in Fig. 2, but curves back to meet the end of the offset part c, as shown. \Vhen the support is folded, the part 0 passes between the spring and the other branch of the arm I). The projecting parts a and 0 are separated by an opening or space, a, of suitable form, as a matter of convenience in casting the arm. lln molding a pattern it is well known that the molding sand is liable to adhere in the corners of the pattern, particularly if said corners are at all acute and sharply defined. This results in the corners being correspondingly filled with the metal when the casting is formed, whichhasto arises! be cut away at much loss of time and labor. In this construction of support the parts 6 and 0, if j oined in a close corner, would co-operate with the spring 15 satisfactorily; but to avoid the filling of said corner with the metal, as above stated, I separate said parts 0 and 0 by the space a, as above set forth, which allows no opportunity for the sand to adhere therein when the pattern is drawn from the sand, as above stated.

I claim as my invention- In a table-leaf support, the arm (I and bifurcated arm b, provided with the circular heads land It, respectively, and united in a flexible joint at c, the arm (I being provided with the projecting parts 0 and 0, substantially as de-.

scribed, to (Jo-operate with the spring branch t of the arm I), the contiguous faces of ti 1e heads k and I having each a groove, 1), and tooth n, the latter extending out from either head into the opposite groove, substantially as shown and described, and for the purpose set forth.

H. J. DURGIN.

\Vitnesses E. B. XVHITMORE, A. M. SHERRooD. 

